I shoot a lot of .410 and 28 on Sporting Clay courses. The regular ones not a small bore gimme course. I use mod and full in the 28 and full and full in the .410. .002 and .005 are worthless pretenders for chokes. On the easier gimme course a more open choke may be of some value but on a regular course tighter chokes come in very handy. But in the end it is your choice and unless you think your gun is going to be a collector then alter it as you will. Not saying an adjustable comb would be my choice, but Brileys are a quality choke tube. You might not recover your cost to have them installed but with the right buyer you might. Just have them carefully measure to see if enough wall thickness still exist for their installation.
It comes down to how much of a collectible a reproduction/modern version of any gun really has? Is it worth keeping it forever as it came of you are at the same time going to shoot it? Normal wear is a lot more of a drain on value to me. Pity we can not have Teague chokes installed. I was looking at a British double with them and you had to look really hard to see any hint of them looking at the muzzle.
